Argentina is triangular in shape and stretches c.2,300 mi (3,700 km) from its broad northern region near the Tropic of Capricorn to Tierra del Fuego, an island shared with Chile, in the south. On the northeast, Argentina fronts on the Río de la Plata (an estuary and one of the major waterways of the Western Hemisphere), which separates Argentina from S Uruguay; its tributaries also act as international boundariesthe Uruguay River, with W Uruguay and S Brazil, and the Paraná, Paraguay, and Pilcomayo rivers, with Paraguay. The northwest boundary with Bolivia lies in the Gran Chaco and the Andes Mts. The western boundary with Chile follows the crestline of the Andes. The Atlantic Ocean borders Argentina on the east; there, off S Argentina, are the Falkland Islands (Islas Malvinas), and the South Georgia, South Sandwich, and South Orkney islands, all dependencies of Great Britain that are claimed by Argentina. Argentina also claims a sector of Antarctica. The climate of Argentina varies from subtropical in the north to cold and windswept in the south, with temperate and dry areas found throughout much of the country. Precipitation, lowest along the E Andean slopes, increases markedly N and E across Argentina. The chief rivers of Argentina are the Paraná with its tributary, the Salado; the Colorado River; the Río Negro; and the Chubut. Argentina may be divided into six geographical regionsthe Paraná Plateau, the Gran Chaco, the Pampa (see under pampas), the Monte, Patagonia, and the Andes Mts. The Paraná Plateau in the extreme northeast is an extension of the highlands of S Brazil. It is the wettest part of Argentina and has a dense forest cover; tobacco, timber, and yerba maté are the chief products there. The spectacular Iguaçu Falls are in a national park located at the point where Argentina, Brazil, and Paraguay meet. * The Columbia Encyclopedia, Sixth Edition. 2001 *

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